Quick answer: PCV Valve Replacement on a 2016–2019 Mercedes-Benz GLE is rated Moderate and takes about 2-3 hours. You'll need 9 tools for this job, and parts cost about $80. This guide walks you through the full job step by step, including the mistakes to avoid.
| Part Name |
Part Number |
Price |
Buy |
| PCV Valve |
2760100331 |
$50.00 |
|
| Crankcase Ventilation Hose |
A2760100631 |
$30.00 |
|
About prices: shown prices are typical retail averages and change frequently; cheaper alternatives may be available. Confirm the current price before buying.
💡 Pro tip: Order all parts at once to save on shipping
Step-by-Step Instructions
Follow these steps carefully
1
Cool the engine and locate the PCV valve
Work on a cool engine. On the Mercedes-Benz GLE, find the PCV valve — usually in a valve-cover grommet, intake manifold port, or integrated into a PCV hose/module. Photograph hose routing before removal. Wear gloves and eye protection.
🔧 Mechanic's note — Ray Delgado
I locate the ML350 PCV valve and I label every hose I disconnect with masking tape — they all look alike going back. I have mixed up vacuum hoses before, and the tape is how future me says thanks.
2
Disconnect the PCV hose
Release any spring clamps or quick-connect fittings and pull the hose from the valve or PCV port. Inspect the hose for cracks, collapse, or oil sludge — replace the hose if damaged.
3
Remove the old PCV valve or module
Pull the valve from its grommet with a gentle twist, or unbolt a PCV module/plate if that is the design. Note orientation and any O-rings. Avoid letting debris fall into the open port.
4
Inspect related parts
Check the grommet for hardening or tears and replace it if soft or cracked. Clean sludge from the port with a shop towel; do not push debris into the engine.
5
Install the new PCV valve
Compare the new valve/module to the old one. Lightly oil the grommet if specified, press or bolt the new unit into place until fully seated, and reconnect the hose until the clamp/connector is secure.
🔧 Mechanic's note — Tom Becker
I compare the new ML350 PCV valve to the old one, checking the grommet fit and connector shape. A valve that seats halfway looks fine until the check-engine light comes on with a vacuum leak.
6
Start and verify idle quality
Start the engine and confirm a smooth idle with no whistle or large vacuum leak sound at the PCV connection. Check for oil seepage.
🔧 Mechanic's note — Ray Delgado
I start the ML350 and listen to the idle after a PCV swap — a vacuum leak from a half-seated valve shows as a rough idle or a whistle. I let it warm fully because some leaks only appear when the plastic expands.
All Done!
Test your repair before closing everything up. If something doesn't work right, double-check your steps.
⚠️ Common Mistakes to Avoid
- • Not disconnecting the battery before starting the repair
- • Forgetting to replace the intake manifold gasket
- • Over-tightening bolts during reassembly
- • Failing to properly clean mating surfaces before installing new parts
- • Not verifying the new PCV valve is functioning correctly after installation
